Consider two hosts, A and B$,$ are connected by two links $($L$1,$ L$2)$ as it is

shown in Figure $1.$ Suppose node A sends a packet with the size of $32$ bytes to node B$.$ By

considering the store$-$and$-$forward operation at router R$1,$ answer the following questions

$($nodal processing and queueing delays can be ignored$)$:

a$)$ What is the end$-$to$-$end delay?

b$)$ How long does it take for propagating one bit from A to B$?$

Bandwidth of L$1=1000$ bps

Bandwidth of L$2=2000$ bps

Length of L$1=10$ m

Length of L$2=20$ m

Propagation speed of links$=2108($m$/$s$)$